Our M1 Garand muzzle mounted cleaning rod guide friction fits on the muzzle for correct alignment of the cleaning rod with the bore. Internal chamber allows for reversal of bore brush or jag without removing the guide. Fits up to 30 cal. rods such as the Dewey coated rods. Works for all calibers. Our guide includes a solvent port for ease of use.Just slip the rod guide over your cleaning rod, then install your jag or brush on the rod prior to placing the Muzzle Buddy on the barrel. Protect that properly crowned muzzle with the new Muzzle Buddy. Built to last a lifetime. This is the last rod guide you will ever need!